I must mar you must mar he must mar we must mar you must mar they must mar
Forma con V-ing
I must be marring you must be marring he must be marring we must be marring you must be marring they must be marring
Perfecto
I must have marred you must have marred he must have marred we must have marred you must have marred they must have marred
Perfecto con V-ing
I must have been marring you must have been marring he must have been marring we must have been marring you must have been marring they must have been marring
Negación
Forma simple
I mustn't mar you mustn't mar he mustn't mar we mustn't mar you mustn't mar they mustn't mar
Forma con V-ing
I mustn't be marring you mustn't be marring he mustn't be marring we mustn't be marring you mustn't be marring they mustn't be marring
Perfecto
I mustn't have marred you mustn't have marred he mustn't have marred we mustn't have marred you mustn't have marred they mustn't have marred
Perfecto con V-ing
I mustn't have been marring you mustn't have been marring he mustn't have been marring we mustn't have been marring you mustn't have been marring they mustn't have been marring
Forma interrogativa
Forma simple
must I mar? must you mar? must he mar? must we mar? must you mar? must they mar?
Forma con V-ing
must I be marring? must you be marring? must he be marring? must we be marring? must you be marring? must they be marring?
Perfecto
must I have marred? must you have marred? must he have marred? must we have marred? must you have marred? must they have marred?
Perfecto con V-ing
must I have been marring? must you have been marring? must he have been marring? must we have been marring? must you have been marring? must they have been marring?
Forma interro-negativa
Forma simple
mustn't I mar? mustn't you mar? mustn't he mar? mustn't we mar? mustn't you mar? mustn't they mar?
Forma con V-ing
mustn't I be marring? mustn't you be marring? mustn't he be marring? mustn't we be marring? mustn't you be marring? mustn't they be marring?
Perfecto
mustn't I have marred? mustn't you have marred? mustn't he have marred? mustn't we have marred? mustn't you have marred? mustn't they have marred?
Perfecto con V-ing
mustn't I have been marring? mustn't you have been marring? mustn't he have been marring? mustn't we have been marring? mustn't you have been marring? mustn't they have been marring?